You can try MultitrackStudio Lite for free. Its main limitation is that it can't handle more than 3 tracks.

32-bit Windows versionWindows 10, 8, 7, Vista, XP5.0 MB

64-bit Windows versionx64 Windows 10, 8, 7, Vista5.5 MB

Mac versionmacOS 10.14/13/12, OS X 10.11/10/9/8/7/66.7 MB

Windows installation: Doubleclick the MultitrackStudio-Lite-WIN32.exe or MultitrackStudio-Lite-WIN64.exe file and follow the instructions that appear on the screen. Hint: use the 32-bit version if in doubt.

Mac installation: Open the MultitrackStudio-Lite-Mac.zip file and drag MultitrackStudio to the Applications folder.